Stock and dies.



H. K. DRAWBAUGH.

STOCK AND DIEE- APPLIOATIOK FILED DBO. 4, 1913.

Patented Aug.25,1914.

INVENTOR WITNESSES:

W M m K g m m 0 W I v: m

THE NORRIS PETERS 60.. PHOTGLITHO, IVASNINGTON. D. U.

UNITED s'rATns PATENT or:

BAUGH, a

i stocks and diesand the srocr: awn nine.

T0 aZZw/zcm it 11mg concern", I i Be it knownthat l, llama-in K. DRAW- citizen of the United States, residing at York, in the county of York and State of Pennsylvania, have invented certain new and useful Improvements in Stocks and Dies; andI do declare the following to be a full, clear, and, exact description 01 the invention, such will enable others skilled in the art to which it appertains to make and use the same. 1 a

,This invention relates to improvements i i. primary object of the invention; is to provide a device of this character so constructed as to allow it to be quickly and easily removed frcn the wort after the thread has been cut thereon, without the necessity of unscrewing the device and causing the teeth of the same to pass over the completed thread. a

A secondary object is to provide means for adjusting the dies for application to ditl er ent sized pipe or shafts.

Still another object is to so construct the cutting edges of the dies that they. will form no shoulder at the termination of the thread.

lvVith the above objects in view, the invention residesineertain novel features of construction and combination herein'described and claimed, and shown in the drawings wherein Figure 1 is a plan view of my improved die stock showing the dies arranged in operative position. therein; and Fig. 2 is a side elevation partly in section of the parts shown in Fig. 1.

In the embodiment illustrated in the drawings, my improved device is shown as comprising in general, a die stock 1, dies 2 slidably mounted thereon and locking members 3i 'or holding said dies in a projected and operative position.

The die stock is in the form of a flat metal plate provided with parallel die guides d on its upper face, with the usual. depending sleeve or apron 5 and sockets (i for the receptionof operating handles and with guides 7 near its opposite ends, the guides T being here shown in the form of lugs.

The above mentioned dies 2 with the usual cutting teeth 8 are slidably mounted between the guides l by means of set screws 9 passing through slots 10 in the dies and into the stock 1.

lpreferably provide still are 12 which overlie came 16 preferably formed are provided and said dies Specification of Letters Eatent. Patient-ind Aug, gil 191 1. Application filed lleceinherd, 1913. Eerial No. scares.

coil springs ll be tween the headset saic set screws and washsaid slots. shown in Fig. 1, thedies 9 an? are provided with indicators adapted to alinesvhen the d. are in the proper position to cut threads on stai'idard sized pipes.

The guides vided with floig tudinal bores in. which sleeves l lareslidably and rotatably mount ed. 1 i. i slee iies 1d are provided. on their inner ends with ,sl'ioulders or projections 15 adapted to be held normally in contact with on the inner ends of theguides T. The sleeves l lare internally threaded for the {reception of screws 17, whichfas shown, project beyond the op posits; ends of said sleeves and have thelr inner ei ofthe diesQ. Operating handles 18 have thei fliuiier ends threaded on the screws 17 and air liunped between the outer ends of the sleet l a-nd lock nuts 19. It also pro vide coil springs E20; whicharedisposed between the handles l8 and the guides T and surround the outer projecting ends of the sleevesll, said springs being adapted to normally hold the shoulders 15 in contact with the cams l6 and to withdraw the sleeves 14- and the screws 17 when the handle 18 is actuated in the proper direction.

By theabove described construction, I am enabled to thread the ends of pipes or shafts in the usual manner and when said pipes to the proper or sliai tsl'iave been threaded point, I may operate the handles l8 which, through the action of the sleeves l l, the shoulders 15, the cams l6 andthe springs 20 will cause the inner ends of the screws 17 to disengage the dies 2. This leaves the dies 9 free to move outwardly so that their cutting teeth will disengage the newly formed threadsand the entire device may then be removed without the usual operation of unscrewingtl e device from said threads.

. By reference to lfig. 2, it will be seen that l bevel thelower ends of the cutting faces of the dies and by so doing no abruptshouh de s willbe left on the threaded article where the threads terminate. 'llhe formation ofthese cutting edges also forces the dies away from the article threaded and disengages the cutting teeth from the contacting with the outer faces '7 on the die stool: l, are pro i thread, as above mentioned, when the latches 3 are withdrawn by the operating mechanism above described.

In order to facilitate the easy operation of the device when cutting threads, I preferably grind the outer beveled faces of the dies 2 on an arch as shown at 21. By so doing, I find that whereas with the ordinary dies and stocks, two men are required to thread a two inch pipe, with the dies ground in this manner one man is enabled to do the same work.

Although I have described my invention with considerable ininuteness, I do not wish to be limited to details other than those amplified in the appended claims.

That I claim as my invention is 1. A device of the character described comprising a die stock, a die movably carried thereby, a guide and acam carried by said stock, a sliding element engaged with said guide and contacting with said die, a shoulder on said sliding element engaging said cam, and means for rotating said sliding element to project the same into contact I with said die.

2. A device of the character described comprising a die stock, a die movably carried thereby, a guide on said stock, a cam on said guide, a sleeve rotatably and slidably mounted in said guide, a shoulder on said sleeve in contact withsaid cam, a screw threaded through said sleeve and bearing against said die, means for retaining said shoulder in contact with said cam for holding said screw in contact with said die, and

means for rotating said'sleeve to move said screw out of contact with said die.

3. A device of the character described comprisin a die stock, a die niovably "carried therehy, a guide on said stock, a cam face on one end of said guide, a sleeve slidably and rotatably mounted in said guide, a projection on said sleeve, a spring for holding said projection in contact with said cam face, a screw threaded through said sleeve and in contact with said die, and'a handle for rotating said sleeve and withdrawing said screw from contact with said die through'the action of the cam, the projection and the spring.

4. A device of the character described comprisin a die stock, a die movably carried thereby, auguide on said stock, a cam face on one end of said guide, a sleeve slidably and rotatably mounted in said guide, and projecting beyond the opposite ends thereof, a projection on one end of said sleeve, a screw threaded through said sleeve and projecting beyond the opposite ends thereof and contacting at one endwith said die, a handle on said screw, 'a lock nut for forcing said handle into contact with One end of said sleeve, and a coil spring on said sleeve between said guide and said handle. In testimony my hand in presence of two subscribing witnesses. c

' HARMAN K. DRAWBAUGH. \Vitnesses:

NOAH C. MAY, WILLIS L. SMYSER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

whereof I have hereunto set I 

